rename pathspec_prefix() to common_prefix() and move to dir.[ch]

Also make common_prefix_len() static as this refactoring makes dir.c
itself the only caller of this helper function.

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/setup.c b/setup.c
index 70b887fe6..ce87900ce 100644
--- a/setup.c
+++ b/setup.c
@@ -264,13 +264,6 @@ const char **get_pathspec(const char *prefix, const char **pathspec)
 	return pathspec;
 }
 
-char *pathspec_prefix(const char **pathspec)
-{
-	size_t len = common_prefix_len(pathspec);
-
-	return len ? xmemdupz(*pathspec, len) : NULL;
-}
-
 /*
  * Test if it looks like we're at a git directory.
  * We want to see: